SMALL-WATERPLANE-AREA TRUSS-TYPE SINGLE PILE FOUNDATION FOR OFFSHORE WIND POWER

Disclosed is a small-waterplane-area truss-type single pile foundation for offshore wind 5 power and a matching piling method, the single pile foundation mainly includes a cylindrical pile bottom, truss-type pile legs and a connecting structure for the upper fan. The cylindrical pile legs are driven below the mud surface, and the truss-type pile legs extend from the mud surface to above the water surface and are connected with a structure for receiving an upper fan at the top. Where the pile foundation part below the mud surface is welded with the truss-type pile leg, and 10 the joint is reinforced and fixed by the toggle plate, the upper support structure is provided with diagonal braces to strengthen the structural rigidity and stability. According to the invention, a special piling sleeve is provided for adapting the piling operation of the single pile foundation. The application aims to solve the problems that the conventional offshore wind power foundation is subjected to excessive wave load on the sea and the ocean current forms scouring around the 15 seabed pile foundation, according to the application the single pile foundation changes the undenNater part of the conventional large-diameter single pile into a truss structure, so the depth and the range of the formed scouring pit are improved due to the reduction of the pile diameter at the mud surface part. On the sea surface, the response of pile foundation to wave load is greatly reduced due to the reduction of waterline area.